from the top of a tower 15.6m high a projectile is thrown up with a velocity of 39.2m/s making an angle of 30 degrees with the horizontal direction .Find the distance from the foot of the tower where it stikes the ground and the time taken by it to do so.

Asked by Sneha Kashyap | 12th Sep, 2013, 01:19: PM

Expert Answer:

From the top of tower, the projectile is thrown. It follows the path as shown below.
 
 
The distance from the foot of tower where the projectile lands is R+x.
 
Now we have,
 
 
After covering this range, the projectile follows a straight line path.
 
Thus, the distance x is
 
Thus, the total distance from the foot of tower is

Answered by Romal Bhansali | 23rd Sep, 2013, 12:54: PM

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